package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常（地址簿为空，购物车为空）
        //地址簿为空
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收获地址是否超出配送范围
        checkOutOfRange( addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //购物车为空
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list == null || list.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setUserId(userId);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orderMapper.insert(orders);
        //向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail(); //订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 1); //1表示来单提醒 2表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 2); //1表示来单提醒 2表示客户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersDB.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    @Override
    public PageResult pageQueryHistoryOrder(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);

        //封装数据到DTO
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        Page<Orders> page = orderMapper.pageQueryHistoryOrders(ordersPageQueryDTO);

        List<OrderVO> result = new ArrayList<>();

        //查询订单明细，封装OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                //订单id
                Long orderId = orders.getId();

                //查询订单明细
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();

                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);

                result.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), result);
    }

    @Override
    public OrderVO detail(Long id) {
        //查询订单数据
        Orders orders = orderMapper.getById(id);

        //查询订单对应的详细数据
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());

        //封装OrderVO对象
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);

        //根据地址簿id查询地址信息
        AddressBook addressBook = addressBookMapper.getById(orders.getAddressBookId());
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        orderVO.setAddress(address);
        return orderVO;
    }

    @Override
    public void cancel(Long id) throws Exception {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //判断订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断是否已接单
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders order = new Orders();

        //判断订单是否已经支付
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01), //退款金额
                    new BigDecimal(0.01)); //订单原金额

            //修改支付状态为：已退款
            order.setPayStatus(Orders.REFUND);
        }

        order.setId(id);
        order.setStatus(Orders.CANCELLED);
        order.setCancelReason("用户取消");
        order.setCancelTime(LocalDateTime.now());

        orderMapper.update(order);
    }

    @Override
    public void repetition(Long id) {
        //方式一
        /*
        ShoppingCartDTO shoppingCartDTO = new ShoppingCartDTO();
        //根据订单id查询购物车详情数据
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        //封装数据到ShoppingCartDTO
        for (OrderDetail orderDetail : orderDetails) {
            if (orderDetail.getDishId() != null) {
                shoppingCartDTO.setDishId(orderDetail.getDishId());
            } else {
                shoppingCartDTO.setSetmealId(orderDetail.getSetmealId());
            }
            shoppingCartDTO.setDishFlavor(orderDetail.getDishFlavor());
            //将菜品添加到购物车
            shoppingCartService.addShoppingCart(shoppingCartDTO);
        }
        */
        //方式二
        //查询当前用户的id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询购物车详情数据
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        //将集合转为ShoppingCart类型
        List<ShoppingCart> shoppingCarts = orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            //将原订单中的菜品信息复制到购物车对象
            BeanUtils.copyProperties(x, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象批量插入到数据库
        shoppingCartMapper.insertBatch(shoppingCarts);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开启分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        //查询订单信息
        Page<Orders> page = orderMapper.pageQueryHistoryOrders(ordersPageQueryDTO);

        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> result = page.getResult();

        //将Orders集合转换成OrdersVO类型的集合
        for (Orders orders : result) {
            OrderVO orderVO = new OrderVO();

            BeanUtils.copyProperties(orders, orderVO);

            //根据订单id查询订单详细信息
            List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());

            //将结果转换成（菜品*数量）的菜品信息字符串集合
            List<String> orderDishList = orderDetails.stream().map(x -> {
                String orderDishes = x.getName() + "*" + x.getNumber();
                return orderDishes;
            }).collect(Collectors.toList());

            //对集合内容进行拼接
            String orderDish = StringUtils.join(orderDishList, "");

            orderVO.setOrderDishes(orderDish);
            orderVOList.add(orderVO);
        }
        //封装返回结果数据
        return new PageResult(page.getTotal(), orderVOList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        //根据状态类型查询订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //封装返回结果数据
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);

        return orderStatisticsVO;
    }

    @Override
    public OrderVO details(Long id) {
        //根据订单id查询订单信息
        Orders orders = orderMapper.getById(id);

        //将orders中的属性拷贝到orderVO中
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);

        //添加订单详细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        orderVO.setOrderDetailList(orderDetailList);

        //将结果转换成（菜品*数量）的菜品信息字符串集合
        List<String> collect = orderDetailList.stream().map(x -> {
            String orderDishes = x.getName() + "*" + x.getNumber();
            return orderDishes;
        }).collect(Collectors.toList());

        String join = StringUtils.join(collect, "");
        //封装返回结果数据
        orderVO.setOrderDishes(join);
        return orderVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //创建订单对象，并封装订单数据
        Orders orders = new Orders();
        orders.setId(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        //根据订单id更新订单数据
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //根据订单id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());

        //判断订单是否存在，并且状态为2
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders order = new Orders();

        //如果用户已经支付，调用微信支付退款接口进行退款
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID) {
            String refund = weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            //更新支付状态为：已退款
            order.setPayStatus(Orders.REFUND);
            log.info("申请退款：{}", refund);
        }

        //封装对象数据
        order.setId(ordersRejectionDTO.getId());
        order.setStatus(Orders.CANCELLED);
        order.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        order.setCancelTime(LocalDateTime.now());

        //根据订单id更新数据
        orderMapper.update(order);
    }

    @Override
    public void cancelOrder(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据订单id查询订单信息
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());

        //判断订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders order = new Orders();

        //如果订单已支付需进行退款操作
        if (orders.getPayStatus() == Orders.PAID) {
            String refund = weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            order.setPayStatus(Orders.REFUND);
            log.info("申请退款：{}", refund);
        }

        //封装对象数据
        order.setCancelTime(LocalDateTime.now());
        order.setCancelReason(ordersCancelDTO.getCancelReason());
        order.setId(orders.getId());
        order.setStatus(Orders.CANCELLED);

        //根据订单id更新订单数据
        orderMapper.update(order);
    }

    @Override
    public void delivery(Long id) {
        //根据订单状态查询订单
        Orders orders = orderMapper.getById(id);

        //判断订单是否存在,并且状态为3
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //封装对象数据
        Orders order = new Orders();
        order.setId(orders.getId());
        order.setStatus(Orders.DELIVERY_IN_PROGRESS);

        //根据订单id更新数据
        orderMapper.update(order);
    }

    @Override
    public void complete(Long id) {
        //根据订单id查询订单
        Orders orders = orderMapper.getById(id);

        //判断订单是否存在，并且状态为4
        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //封装对象数据
        Orders order = new Orders();
        order.setId(orders.getId());
        order.setStatus(Orders.COMPLETED);

        //根据订单id更新订单数据
        orderMapper.update(order);
    }

    /**
     * 检查客户的收货地址是否超出范围
     * @param address
     */
    public void checkOutOfRange(String address) {
        Map map = new HashMap<>();
        map.put("address", shopAddress);
        map.put("ak", ak);
        map.put("output", "json");

        //获取店铺的经纬度坐标
        String shopCoordinates = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3?", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinates);

        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");

        String lng = location.getString("lng"); //经度
        String lat = location.getString("lat"); //纬度

        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);

        //获取用户的经纬度坐标
        String userCoordinates = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3?", map);

        jsonObject = JSON.parseObject(userCoordinates);

        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");

        lng = location.getString("lng"); //经度
        lat = location.getString("lat"); //纬度

        //用户收获地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/direction/v2/driving?", map);

        jsonObject = JSON.parseObject(json);

        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray)result.get("routes");
        Integer distance = (Integer)((JSONObject)jsonArray.get(0)).get("distance");

        if (distance > 5000) {
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
